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(11)

EP 4 133 578 A1

(12)

(43) Date of publication: 15.02.2023 Bulletin 2023/07 (21) Application number: 21785444.7 (22) Date of filing: 11.03.2021

(51) International Patent Classification (IPC):  H02K 5/132(1980.01) H02K 1/27(1990.01) H02K 21/24(1968.09) E21B 43/12(1968.09) H02K 9/19(1968.09) H02K 7/00(1968.09) F04D 13/10(1968.09) (52) Cooperative Patent Classification (CPC): H02K 5/132; H02K 1/2793; H02K 2213/12; H02K 16/04; H02K 21/24; E21B 43/128; F04D 13/10; F04D 13/0666; F04D 29/406; F04D 29/628; F04D 29/648 (86) International application number: PCT/US2021/021933 (87) International publication number: WO 2021/206856 (14.10.2021 Gazette 2021/41)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 08.04.2020 US 202063007052 P 09.03.2021 US 202117196235 (71) Applicant: Halliburton Energy Services Inc. Houston, Texas 77032-3219 (US)

(72) Inventors: SHETH, Ketankumar Kantilal Tulsa, Oklahoma 74136 (US) BROWN, Donn J. Broken Arrow, Oklahoma 74014 (US) BECK, David Christopher Broken Arrow, Oklahoma 74012 (US) DE LONG, Robert Charles Sand Springs, Oklahoma 74063 (US) KOPECKY, Trevor Alan Owasso, Oklahoma 74055 (US) (74) Representative: Hoffmann Eitle  Patent- und Rechtsanwälte PartmbB Arabellastraße 30 81925 München 81925 München (DE)